(Business 2.0) -- Asking venture capitalists for great startup ideas is a little like asking Curt Schilling what pitch he's going to throw next. When we posed the question to dozens of VCs and investors around the country, more than a few indignantly shot back, "Are you out of your mind?"

But after some friendly prodding from our reporters, a surprising number of them couldn't help but start jawing about companies they would love to build - if only the right people could be found to perfect the technologies or the business plans and make them seem possible.

The result is this list of 20 tantalizing business ideas, ranging from a host of new websites and applications to next-generation power sources and a luxury housing development.

This isn't small-time thinking, either: These investors - which include some of Silicon Valley's most successful VCs as well as serial entrepreneurs like Steve Case and Howard Schultz are backing their ideas with a collective $100 million in funding to the entrepreneurs who can get them off the ground.

We don't guarantee you'll land a multimillion-dollar payday or even get your foot in the door. But with the ideas now in your hands, consider yourself halfway there.